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Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof

A technology of attapulgite clay and nano-composite materials, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, refined hydrocarbon oil, etc., can solve the problems of changing the surface properties of palygorskite, low catalytic activity, environmental hazards, etc., and achieve Reduce preparation cost, improve catalytic performance, and improve performance

Inactive Publication Date: 2009-09-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research results reported in literature at home and abroad, in tar catalytic cracking and catalytic tar steam reforming, the catalytic activity of metal oxides is low, and treating palygorskite clay with acid for a long time will destroy the palygorskite crystal structure and change The surface properties of palygorskite. In addition, the pretreatment of clay in this preparation method consumes acid and produces acidic drainage. In the subsequent pH adjustment process, more alkali is consumed and high-salinity wastewater is discharged, which causes great harm to the environment.

Method used

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  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof
  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof
  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Select attapulgite clay ore that meets the requirements for pre-stacking and homogenization;

[0037] Add water to the stocked and homogenized attapulgite clay raw materials, adjust the water content of the attapulgite clay to a mass ratio of 30-50%, and shear and extrude the attapulgite clay flakes by a pair of rollers and a multi-roll extruder. It promotes the depolymerization and dispersion of attapulgite crystal beam;

[0038] The attapulgite clay flakes are dried and then pulverized into attapulgite clay powder passing through a 200-mesh sieve;

[0039] Add 100g of attapulgite powder to 500ml of water, aging for 24 hours, then use a high-speed mixer to stir at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 20g ferric nitrate, stir for 20 minutes, add 10g Nickel nitrate, keep stirring until no bubbles are generated, then add 10% sodium hydroxide solution dropwise, stir at high speed at 10000r / min for 5min, adjust the pH of the suspension to...

Embodiment 2

[0046] Select attapulgite clay ore that meets the requirements for pre-stacking and homogenization;

[0047] Add water to the stocked and homogenized attapulgite clay raw materials, adjust the water content of the attapulgite clay to a mass ratio of 30-50%, and shear and extrude the attapulgite clay flakes by a pair of rollers and a multi-roll extruder. It promotes the depolymerization and dispersion of attapulgite crystal beam;

[0048] The attapulgite clay flakes are dried and then pulverized into attapulgite clay powder passing through a 200-mesh sieve;

[0049] Add 100g of attapulgite powder to 1000mL of water, aging for 24 hours, then use a high-speed mixer to stir at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 30g of ferric nitrate, and continue stirring until no bubbles are generated. Then 10% sodium hydroxide solution was added dropwise, and stirred with a high-speed mixer at 10,000 r / min for 5 minutes, and the pH value of the suspension wa...

Embodiment 3

[0055] Select the attapulgite clay ore that meets the requirements, and crush it into attapulgite clay powder that passes through a 200-mesh sieve;

[0056] According to the ratio of 100g attapulgite powder to 1000mL water, add water soaking and aging for 48 hours, stir with a high-speed mixer at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 20g nickel nitrate, and continue stirring until nothing Bubbles are generated, and then 10% sodium hydroxide solution is added dropwise, and stirred with a high-speed mixer at 10,000 r / min for 5 minutes, and the pH value of the suspension is adjusted to be greater than 8, so that the added nickel ions are completely hydrolyzed.

[0057] The suspension is filtered, washed and dehydrated into a mud cake with a plate and frame filter press with washing function, dried, crushed and sieved as needed to obtain different particle sizes of 0.1-0.2mm, 0.2-0.5mm, 0.5-1.0mm Particles to meet the requirements of the catalyti...

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Abstract

An attapulgite clay-Ni / Fe nano composite material, a preparation method and applications thereof are characterized in that the attapulgite clay is taken as the raw material; metallic nickel and / or metallic iron particles with the diameter less than 20nm are loaded on the surface of attapulgite rhabdolith with the diameter between 40 and 50nm; the preparation method is that the attapulgite clay is prepared into suspension liquid, then the suspension liquid is hydrolyzed with iron salt and nickel salt and loaded on the surface of attapulgite crystal in the precipitation form of hydroxide, and finally the composite material is prepared through washing, dehydration, forming, drying and hydrogen reduction and calcination. With a nano structure, the composite material has low activation energy, high catalytic activity and strong resistance to carbon deposit, and can be applied to catalytic pyrolysis and purification of thermal gas and tar of a biomass gasification furnace and the catalytic pyrolysis of other various organisms.

Description

Technical field [0001] The invention belongs to the field of energy and chemical industry, and relates to a nano material with attapulgite clay as a carrier and nickel and / or iron nano metal particles as an active component, a preparation method and its application in the catalytic cracking of biomass gasification gas to purify tar. Background technique [0002] my country produces about 1 billion tons of various straws each year, and agricultural and forestry products and industrial enterprises that use biomass as raw materials also produce hundreds of millions of tons of processing residues. Biomass resource is a kind of renewable clean energy, which can realize CO 2 Zero emissions, greatly reducing the greenhouse effect and environmental pollution. The development and utilization of biomass energy to replace mineral energy such as petroleum and coal is one of the important ways to solve energy and environmental problems. Judging from the current research progress, biomass pyro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/745B01J21/16B01J37/18B01J20/12C10G11/02C10G25/00
Inventor 陈天虎刘海波张先龙何宏平
Owner HEFEI UNIV OF TECH
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